Update binding for Retina clusters

The following discussion from !396 (merged) should be addressed:

• @gunther started a discussion:

  binding usage of Retina clusters like this is deprecated, you should use this https://gitlab.cern.ch/lhcb/Moore/-/blob/e7dff0be07dea8147eca96a3125f5404fb1c688a/Hlt/RecoConf/options/hlt2_light_reco_pr_kf_without_UT_with_monitoring.py#L35